<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div id="app">
  <h1>{{message}}</h1>
  <h2>{{firstName}}</h2>
  <h2>{{firstName + lastName}}</h2>
  <h2>{{firstName}} {{lastName}}</h2>
  <h2>{{counter * 2 }}</h2>
</div>

<script src="../js/vue.js"></script>
<script>
    const  app = new Vue({
      el:'#app',
      data:{
        message: '卢本伟牛逼！',
        firstName: '莫',
        lastName: '偿命',
        counter: 100
      }
    })
</script>
</body>
</html>